Slag-pocket floor



' G. WORTON.

SLAG POCKET FLOOR.

APPLICATION FILED FEB. 3. 1917.

1,365,436. Patented Jan. 1921.

2 SHEETS- T I.

FIG- 1 FIG. 2

WITNESSES INVENTOR S. G. WORTON.

SLAG POCKET FLOOR. APPLICATION FILED FEB, 3. 1917.

1,365,436. Patented Jan. 11, 1921.

2 SHEETS-SHEET 2.

FIG-3 WITNESSES INVENTOR specification.

SAMUEL G. WOB-TON, OF DUQUESNE, PENNSYLVANIA.

SLAG-POGKE'I FLOOR. 7

Specification of Letters Patent.

Patented Jan. 11, 1921.

Application filed February,3, 1917. Serial No. 146,396.

To all wiwm'it may concern:

Be it known that I, SAMUEL G. WoR'roN, a'citizen ofthe United States,residing at Duquesne 1n the county of Allegheny and State oflen'nsylvania, have invented certain new and useful Improvements inSlag- Pocket Floors, of which the following is a.

My invention relates to the construction of regenerative reverberatoryfurnaces and more particularly to the construction and arrangement ofthe flues which connect the ports, located at each end of such furnaces,with the furnace regenerator chambers.

In operating regenerative furnaces large quantities, of finely dividedsolids which are carried in suspension in the waste gases or products ofcombustion, pass from the furnaces through the ports into theregenerator flues and become deposited in the flues and regeneratorchambers. With regenerative open hearth furnaces it also frequentlyhappens that in operatingsuch furnaces slag Will boil over the furnaceports and enter the furnace flues connecting the ports and re eneratorchamber of the furnaces.

he accumulations of such materials in the flues lessen the eflidiency ofthe furnaces and occasion frequent delays in the operation of thefurnaces in order to remove the materials which are highly heated whenentering the flues. I

One object of the invention is the pro vision of means whereby finelydivided solids and (in the case of openhearth furnaces) any molten slagentering the flues, are pocketed or collected and are quickly cooled aspocketed orcollected, so as to enable accumulations of such materials tobe easily and quickly removed and to avoid longdelays in the operationof the furnace otherwise necessary in order that the accumulated'materials may cool sufiiciently to permit of their being handledmanually in the removal thereof.

Another object of my invention is to provide a regenerative furnacehaving flues adapted to rapidl cool or chill the finely divided solidsan molten slag as they are pocketed or collected, so as to enable the Icollected material to be easily and quickly.

removed from the flues during stops in the operation of the furnace atthe end of each week-or during shorter or longer intervals when 'for anyreason the operation of the furnace is interrupted, and therebyefiect asaving of time-and labor in the operation of the furnace, and lessen andto a large extent solids into the furnace regenerators.

A further object of this invention is the provision of a regenerativefurnace wherein the flues connecting the furnace hearth and regeneratorchambers havethe novel arprevent the passage of finely dividedrangements, constructions and combinationsv of parts shown in thedrawings, to be more fully described hereinafter and to be specificallypointed out in the appended claims.

Referring now to the part of this specification, Figure 1 is a sectionalend elevation at one endof a regenerative furnace showing the fluesconnecting the furnace and furnace regenerators constructed and arrangedin accordance with my invention.

Fig. 2 is-a sectional side elevation of the furnace shown in Fig. 1, thesection being taken on the line II-II of Fig. 1.

Fig. 3 is a sectional plan showing the arran ement and location of theflues relative to t e end of the furnace and the furnace regenerators,the refractory material on top of the metal floor being omitted for thesake of clearness.

Fig. 4 is a sectional elevation showing details 1n the construction andarrangement of the removable metal floors as constructed in accordancewith my invention.

Fig. 5 is a longitudinal sectional elevation showing details in theconstruction of-a sectional metal floor made in accordance flues formingslag pockets in which quanti ties of finely'divided solids or slag orboth.

become deposited during the operation of the furnace. The enlarged fluesor slag pockets 7 and 8 at the end opposite that to which the verticalflues 5 and 6 are connected open into there-generator chambers 9 andlO.

drawings forming A similar arrangement offair and gas ports 3 and 4 andvertical and horizontal flues or slag pockets 5, 6, 7 and 8, areemployed to connect the other end of the furnace 2 with the air and gasregenerators for that end of the furnace.

In each of the slag pockets 7 and 8 is a hollow metal water cooled floorwhich is removably secured on the bottom or refractory floor of,the slagpocket. The metal floor may be formed of an integral hollow casting 11as shown on the bottom of the slag pocket 8' or may be made in sectionsin the manner shown on the bottom of the slag pocket 7.

The removable metal floors preferably are water cooled, suitableprovision being made to cause a constant circulation of water or othercooling fluid within the hollow floor.

The integrally formed and removable floor 11 shown in the slag pocket 8is rectangular in cross section and of a Width equal to or slightly lessthan that of the slag pocket. Its inner end is closed and the other orouter end, which projects through the vertical end wall 12 of the slagpocket 7, has an opening 11 therein and is curved upwardly.

On account of the width of the rectangular casting forming the floor 11,vertically extending partitions13 are provided within the casting toeffect a circulation of the cooling 'fluid and to support and preventwarping of the large flat top and bottom surfaces of the casting.

Inserted in the open end 13 of the floor 11 is a plurality of supplypipes 14, these pipes extending inwardly to a point closely adjacenttotlg inner end of the hollow casting or floor. The outer ends of thepipes 14 are connected to a source of water supply or other coolingmedium used, and the open end 13 of the floor casting discharges thewaste water into the overflow trough 15 in front of and at a levelslightly below the open end of the hollow metal floor. A drain'pipe 16is provided on the trough 15 to carry away the water discharged thereinfromfthe floor casting 11.

In the hollow metal floor construction shown in the slag pocket 7, aseries of wrought metal pipes 17 are employed to form ,a cover for thefloor, these pipes being laid side by side and having the inner endsthereof closed by means of plugs 18 which preferably are welded inplace. The outer ends of the pipes forming the hollow metal floorproject beyond the end of the slag pocket 7 and terminate in pipefittings'19 known as Ts. The branch outlets 20 of these Ts extendupwardly and are provided with short pieces of pipe 21 so as to at alltimes maintain a head of water within the pipes.

A small water supply pipe 22 is inserted in each of the pipes 17 throughthe plug 23 screwed in one end of the Ts 19, the inner ends of thesupply pipes extending to the point adjacent to the inner ends of thelar e pipes 17 and the outer ends of the supp y pipes 22 are connectedto a source of Water supply.

Each of the short pipes 21 forming branch outlets on the Ts has a smalloverflow pipe 24 therein which is arranged to discharge into an overflowtrough 15 in front of the pipes. The overflow pipe 15 is provided with adrain pipe 16 leading to a sewer or other place of disposal of the waterused in cooling the metal floor of the slag pocket.

After the removable metal floor is positioned on the bottom of the slagpockets, it is covered with a layer of refractory material 26, thismaterial preferably being in a finely divided state. The refractorymaterial acts as an insulator and protects the metal floor from theintense heat of the initial layer of slag and also preventing stickingof the slag to the floor and facilitating the removal of deposits of thematerials.

The ends of the slag pockets are ordinarily closed by a temporary wall25 which is in place during the operation of the furnace and which istorn down in order to remove accumulations of slag and other solidscollected in the slag pocket, the wall being rebuilt after each time theslag pockets are cleaned.

In the operation of furnaces equipped with my invention the finelydivided solids become deposited in the large flues forming the slagpockets 7 and 8, and in the case of an open hearth furnace, any moltenslag Which boils over the ports 2 and 3.into the flues formin the slagpockets becomes deposited on file metal floor formed by the casting 11or pipes 17. As the floor is water cooled it maintains the layer ofrefractory material on top of the floor in a cooled condition andrapidly chills the finely divided solids and any slag on the floor sothat accumulations of these materials become built u in layers and donot form a solid mass. T lle layers of accumulated material areseparately cooled so that when it is desired to remove accumulations itis necessary to delay the operation of the furnace for a long timeinterval in order for the accumulated materials to cool sufficiently topermit of their removal. In this way the time required in vremovingaccumulated materials from the slag pockets is reduced and the necessityof stopping the operation of the furnace for long time intervals inorder to remove such materials is avoided and overcome. The removablemetal, water cooled floors may be applled to exlsting furnaces 'withoutchanges in the construction of the flues or slag pockets and can beremoved or renewed at any time without altering the. floor or side wallsof the slag pockets or flues.

Modifications in the construction and arrangement of the metal watercooled floor forming the novel feature of my invention may be made, thelayer of refractory materlal on top of the metal floor may be omittedwhen desired, and other changes may be made without departing from the1nvention as defined in the appended claims.

I claim 1. In a regenerative furnace, the combination with a furnaceregenerator and a flue opening-into the interior of the furnace, of aninterposed sla pocket connecting the regenerator to the ue, said slagpocket havinga refractory bottom and having a hollow metal floorremovably supported on said refractory bottom, and means for circulatinga cooling medium within said hollow metal oor.

2. In a regenerative furnace, the combination with the furnaceregenerators and flues opening into the interior of the furnace, of

interposed slag pockets connecting the regenerators to said flues, saidslag pockets having refractory bottoms and having hollow metal floorsremovably supported on said refractory bottoms, and means forcirculating a cooling medium within said hollow metal floor.

3. In a regenerative furnace, the combination with the furnaceregenerators and flues opening into the interior of the furnace, ofinterposed slag pockets connecting the regenerators to said flues, saidslag pockets having refractory bottoms, sectional hollow metal floorsremovabl supported on said refractory bottoms, and means for circulatinga-coo'ling medium within each section of said hollow metal floor.

4. In a regenerative furnace, the combination with the furnaceregenerators and flues opening into the interior of the furnace,'ofinterposed slag pockets connecting said regenerators to saidv flues,said slag pockets having refractory bottoms, metal floors removablysupported on said refractory bottoms, said metal floors bein made insections, and the sections being ollow and extending to the exterior ofthe slag pockets, a conduit within each floor section for discharging acoolin medium at the inner end thereof, an ove 0w outlet at the oppositeend of each section, said outlets opening into the atmosphere and beingelevated above the level of the main portion of the floor sections tomaintain the cooling medium under a head, and a covering of refractorymaterial on top of said sectional metal floor.

5. In a regenerative furnace, the combination with the furnaceregenerators and flues opening into the interior of the furnace, ofinterposed slag pockets connecting said regenerators to said flues, saidslag pockets having refractory bottoms, metal floors re movablysupported on said refractory bottoms, said floors being made in sectionsand the sections being hollow, a conduit within each metal floor sectionfor delivering water to the inner end thereof, an overflow outlet at theopposite end of each floor section, said outlets opening into theatmosphere and being elevated above the level of the body portion of thefloor section to maintain the Water under a head, and a loose coveringof finely divided refractory material on top of said sectional metalfloor.

6. In a regenerative furnace, the combination with a furnace regeneratorand a flue opening into the interior of the furnace, of an interposedslag pocket connecting the regenerator to the flue, said slag pockethaving a refractory bottom and having a hollow metal floor removablysupported on said re fractory bottom, means for circulating a coolingmedium within said hollow metal floor, and a loose covering of finelydivided refractory material on top of said hollow metal floor.

7. In a regenerative furnace, the combination with the furnaceregenerator-s and flues opening into the interior of the furnace, ofinterposed sla pockets connecting the regenerators to t e flues, saidslag pockets having refractory bottoms and removable metal floorssupported on said refractory bottoms, said metal floors being hollow andextending outwardly beyond one end of said slag pockets, conduits fordelivering water to the inner end of said removable metal floors and anoverflow outlet at the projecting end of the floors, said outlets beingarranged to maintain the water within said hollow floors under a head.

8; In a regenerative furnace, the combination with the furnacercgenerators and fluets opening into the interior of the furnace, ofinterposed slag pockets connectingsaid regenerators to said flues, saidslag pockets having refractory bottoms with metal floors removablysupported on said refractory bottom, said floors being hollow andextending outwardly beyond one end of said slag pockets, conduits fordelivering water to the inner end of said hollow metal floors. and anoverflow outlet at the opposite end of the hollow metal floors, saidoutlets opening into the atmosphere and being elevated above the levelof the metal floor to maintain the water within the hollow floor under ahead.

In testimony whereof I have hereunto set my hand.

SAMUEL G. lVOR-TON.

